Arcade machines have long relied on various authentication systems to control access and ensure secure operation. The most common types include:

1. Coin-Operated Systems – Traditional arcade machines use coin slots to authenticate users. Players insert coins to activate gameplay, with mechanisms detecting valid currency.

2. Token-Based Authentication – Many arcades issue proprietary tokens instead of coins to prevent counterfeit money usage. These tokens are often customized for specific venues.

3. Magnetic Card Readers – Some modern arcades use swipe cards or RFID-enabled passes for authentication, allowing prepaid credits or membership access.

4. Digital Keypads or PIN Systems – High-end machines may require a PIN or password for operator access, preventing unauthorized configuration changes.

5. Biometric Scanners – Rare but emerging, fingerprint or facial recognition systems are used in premium arcades for secure player identification.

These systems ensure fair play, prevent fraud, and help arcade operators manage revenue effectively. The choice depends on cost, security needs, and user convenience.